Point to Point T1 with 2 Cisco 2600 routers

We currently have a point to point T1 from our main office to a remote office. We’re looking to replace our outdated IBM routers (I didn’t even know IBM made routers) with Cisco 2620 routers. I ‘m not sure what needs to be configured on the WIC T1 DSU. Here is what I have.

Router 1:
interface Serial0/0
ip address 192.168.136.2 255.255.255.0
no ip unreachables
no fair-queue
no cdp enable

Router 2:
Interface Serial0/0
ip address 192.168.136.1 255.255.255.0
no ip unreachables
no fair-queue
no cpd enable

From what I’ve read I might need line coding,
Clock source, time slots, and encapsulation. Is that correct?